Stronghold not generated when compromised by biome (Deep Ocean)

Details

Description

The bug

Strongholds are not generated as intended (missing entirely). In their place is a large void lack in caves, water, lava, ravines, abandoned mine shafts is generated. (Solid with standard peppering of stone, granite, diorite, sand, dirt, gravel).

Notes

The world we use was generated in 1.11. The missing stronghold occurs randomly in re-creating this world. If the developers would like a copy of our world, please let me know. It is currently over 5GB large (16k by 16k has already been explored).